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Note 14 - Income Taxes (Details) - Significant components of the Company’s deferred tax assets and liabilities consist of the following (USD $)
Dec. 31, 2013
Dec. 31, 2012
Deferred tax assets:    
Deferred revenue $ 852,207 $ 1,988,509
Stock-based compensation expense 1,358,554 1,584,583
Tax credit carry forward 19,967 194,364
Net operating loss carryforward, foreign 2,578,640 2,520,746
Accrued expenses and other 649,402 954,559
Inventory reserve 283,996 405,302
Deferred tax asset 5,742,766 7,648,063
Deferred tax liabilities:    
Acquisition-related Intangibles (6,056,162) (6,482,404)
Depreciation (6,964,428) (6,131,473)
Deferred tax liability $ (13,020,590) $ (12,613,877)